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Finding the Fourth Proportional to 387.25, 576.47 and 369.55

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Solution

The fourth proportional to 387.25, 576.47 and 369.55 is: 550.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.25 : 576.47 = 369.55 : x
  2. Step 2: Convert to fraction form
    387.25/576.47 = 369.55/x
  3. Step 3: Cross multiply
    387.25x = 576.47 × 369.55
  4. Step 4: Simplify right side
    387.25x = 213,034.49
  5. Step 5: Solve for x
    x = 213,034.49/387.25
  6. Step 6: Final answer
    x = 550.12

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.